JPS585796B2 - Manufacturing method of rough aluminum plate for offset printing - Google Patents
Manufacturing method of rough aluminum plate for offset printingInfo
- Publication number
- JPS585796B2 JPS585796B2 JP15281676A JP15281676A JPS585796B2 JP S585796 B2 JPS585796 B2 JP S585796B2 JP 15281676 A JP15281676 A JP 15281676A JP 15281676 A JP15281676 A JP 15281676A JP S585796 B2 JPS585796 B2 JP S585796B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- voltage
- electrolytic
- aluminum plate
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Description
【発明の詳細な説明】
本発明は一解粗面化処理法によるオフセット印刷版材用
のアルミニウム粗面板の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an aluminum roughened plate for offset printing plate material by a one-shot roughening treatment method.
一般にアルミニウム板をオフセット印刷用版材として使
用するためには製版処理に際しての感光膜の被着性の向
上と印刷に際しての湿し水保水性の改善のために予じめ
その表面を粗面化処理しておくことが行われるが、この
粗面化処理ば製版後、実際にオフセット印刷を行なった
場合に版材の印刷性能や耐刷性能に著しい影響をおよぼ
すので、その良否は版材製作上重要なポイントの一つに
なっている。Generally, in order to use an aluminum plate as a plate material for offset printing, its surface is roughened in advance in order to improve the adhesion of the photosensitive film during the plate-making process and to improve the dampening water retention during printing. However, this roughening treatment has a significant effect on the printing performance and printing durability of the plate material when offset printing is actually performed after plate making, so its quality depends on the plate material manufacturer. This is one of the most important points.
版材用アルミニウム板の粗面化処理法としてはポール研
摩法やブラシング研摩法などの機械的処理法もあるが、
塩酸や硝酸あるいはこれらを主体として含む電解液を使
用して板面を電気化学的に腐食する電解粗面化処理法は
アルミエウム単板の処理のみならず、ストリツプ板を連
続的に処理するのに適しているので近年着目されている
。There are mechanical processing methods such as pole polishing method and brushing polishing method to roughen the surface of aluminum plate for plate material.
The electrolytic surface roughening treatment method, in which the plate surface is electrochemically corroded using hydrochloric acid, nitric acid, or an electrolyte containing these acids, is useful not only for treating aluminum veneers, but also for continuous treatment of strip plates. It has attracted attention in recent years because of its suitability.
而して、電解処理法では上記したように塩酸または硝酸
、あるいはこれらを主体として含む電解液を使用し電解
槽内において黒鉛板等の適当な電解板を対極とし、交流
電流によってアルミニウム板の電解処理を行なうのであ
るが、硝酸またはこれを主体とする電解液を使用した場
合に得られる粗面化面は比較的微細なピット構造を有し
、且つそのピット面に更に極く微細な凹凸が存在する二
重構造的なピット構造を示すが、そのピット深さが全体
的に浅いのに対し、塩酸またはこれを主体とする電解液
を使用した場合にはピット深さは一般に深いが、ピット
面が比較的平滑であって、硝酸系の電解液を使用したと
きのような複雑な凹凸面とはならない。As mentioned above, the electrolytic treatment method uses hydrochloric acid or nitric acid, or an electrolytic solution mainly containing these, and uses an appropriate electrolytic plate such as a graphite plate as the counter electrode in an electrolytic cell, and electrolyzes the aluminum plate with alternating current. The roughened surface obtained when nitric acid or an electrolyte mainly composed of nitric acid is used has a relatively fine pit structure, and the pit surface also has extremely fine irregularities. It shows a double pit structure, but the pit depth is generally shallow, whereas when hydrochloric acid or an electrolyte mainly composed of hydrochloric acid is used, the pit depth is generally deep, but the pit depth is shallow overall. The surface is relatively smooth and does not have complicated irregularities like when a nitric acid-based electrolyte is used.
このような粗面化面のピット構成の違いは版材の印刷性
能や耐刷性能に微妙に影響し、硝酸系電解液による粗面
版より得られた版材は印刷部数は比較的少ないが、繊細
な画像の要求される高級美術印刷の如きに適し、また塩
酸系電解液による粗面板より得られた版材は新聞、雑誌
などの耐刷力を重点とする印刷に適するといわれ、それ
ぞれの適用範囲にある程度の限界があった。These differences in the pit structure of the roughened surface have a subtle effect on the printing performance and printing durability of the plate material, and the number of copies printed on the plate material obtained from the roughened plate using nitric acid-based electrolyte is relatively small. It is said that it is suitable for high-quality art printing that requires delicate images, and plates obtained from rough plates using hydrochloric acid-based electrolytes are suitable for printing newspapers, magazines, etc. where printing durability is important. There were some limits to its applicability.
また、従来の交流電流による電解粗面化法の共通的な問
題点として電解条件と電解液組成との間に強い相関性が
あって、均一な粗面板を安定して得ることができる好適
電解条件に対して適応できる電解液の組成範囲が比較的
狭いので、これが電解粗面板の版材としての適用範囲を
一層狭いものにしていた。In addition, a common problem with the conventional electrolytic surface roughening method using alternating current is that there is a strong correlation between the electrolytic conditions and the electrolyte composition. Since the composition range of the electrolytic solution that can be adapted to the conditions is relatively narrow, this makes the range of application of the electrolytically textured plate as a plate material even narrower.
発明者らは種々研究の結果、塩酸系電解液を使用して版
材用アルミニウム板の電解粗面化処理を施こすに際し、
交番波形電流を用いその陽極時雷圧ＶＡが陰極時電圧Ｖ
ｃよりも大なるように槽電圧を印加し、陽極時電気量Ｑ
Ａを陰極時電気量Ｑｃよりも大なるように通電量を調整
してやるときは二重構造的な微細凹凸面を有する均一な
粗面板を極く短時間の電解処理で効率的に得ることがで
きること、また、電圧調整によって与えられる陽陰極時
の電気量比ＱＣ／ＱＡの比率を適宜変化せしめることに
より、ピット径や深さを任意に調整することができるこ
となどを見出した。As a result of various studies, the inventors found that when performing electrolytic surface roughening treatment on aluminum plates for printing plates using a hydrochloric acid-based electrolyte,
Using an alternating waveform current, the lightning voltage VA at the anode is the voltage V at the cathode.
Apply the cell voltage so that it is greater than c, and the amount of electricity at the anode Q
When adjusting the amount of current so that A is larger than the amount of electricity Qc at the cathode, it is possible to efficiently obtain a uniformly roughened plate having a double-structured finely uneven surface with an extremely short electrolytic treatment. Furthermore, it has been found that the pit diameter and depth can be adjusted arbitrarily by appropriately changing the ratio of the quantity of electricity QC/QA between anode and cathode provided by voltage adjustment.
こうして得られた二重細造的凹凸面を有するアルミニウ
ム粗面板はこのまゝでも使用出来るが、さらに硫酸電解
液を用いた陽極酸化処理を施し板面に硫酸陽極処理特有
の硬質多孔性の保護皮膜を形成さすことによって、感光
膜被着性、湿し水保水性および耐摩耗性の一層改善され
た版材用粗面板とすることができる。The rough aluminum plate with the double finely textured uneven surface obtained in this way can be used as is, but it is further anodized using a sulfuric acid electrolyte to protect the plate surface from the hard porosity that is unique to sulfuric acid anodization. By forming a film, it is possible to obtain a rough plate for printing plates with further improved photosensitive film adhesion, dampening water retention, and abrasion resistance.
即ち、本発明はアルミニウム板を塩酸系電解液中で陽極
時電圧ＶＡが陰極時電圧Ｖｃより大なるよう槽電圧を調
整印加した交番波形電流を用い電解粗面化処理を施し、
ついで硫酸電解液中で陽極酸化処理を施すことによって
硬質の保護皮膜を有する粗面化面を形成せしめることを
特徴とするオフセット印刷用アルミニウム粗面板の製造
法である。That is, in the present invention, an aluminum plate is subjected to electrolytic surface roughening treatment in a hydrochloric acid electrolyte using an alternating waveform current applied with the cell voltage adjusted so that the anode voltage VA is larger than the cathode voltage Vc,
This is a method for producing an aluminum roughened plate for offset printing, characterized in that a roughened surface having a hard protective film is formed by anodizing in a sulfuric acid electrolyte.
本発明における電解粗面化処理において使用される塩酸
系電解液とは０．０５〜５重量％の範囲で塩酸単味を含
む水溶液電解液のほかこれに腐食抑制剤、安定化剤とし
て例えば塩化亜鉛、塩化アンモニウム、食塩等のｃｌを
含む塩類、モノアミン、ジアミンなどのアミン類、アル
デヒト、ＥＤＴＡ等の有機剤、燐酸、クロム酸、硝酸な
どの酸類の極く僅かを添加したものであっても差支えな
い。The hydrochloric acid-based electrolytic solution used in the electrolytic surface roughening treatment in the present invention is an aqueous electrolytic solution containing simple hydrochloric acid in the range of 0.05 to 5% by weight, as well as corrosion inhibitors and stabilizers such as chloride. Even if very small amounts of salts containing chlorine such as zinc, ammonium chloride, and common salt, amines such as monoamines and diamines, organic agents such as aldehydes and EDTA, and acids such as phosphoric acid, chromic acid, and nitric acid are added. No problem.
また交番波形電流とは正負の極性を交互に交換せしめて
得られる波形の電流であって、第１図にその電圧波形図
を例示する。Further, an alternating waveform current is a current having a waveform obtained by alternately exchanging positive and negative polarities, and an example of the voltage waveform diagram is shown in FIG.
第１図においてａは正弦波、ｂは矩形波、Ｃは台形波の
電圧波形を示すが、本発明の交番波形電流は上記した電
圧波形のものに限るものでない。In FIG. 1, a shows a voltage waveform of a sine wave, b shows a rectangular wave, and C shows a trapezoidal wave, but the alternating waveform current of the present invention is not limited to the voltage waveform described above.
本発明の電解粗面化処理においてはかかる電圧波形を示
す交番波形電流を用い、第１図に示す如く陽極時電圧Ｖ
Ａを陰極時電圧ｖｃよりも大なるように槽電圧を印加す
ることによって陽極時電気量ＱＡが陰極時電気量Ｑｃよ
りも大なるように陽陰極時の通電量を調整しつつアルミ
ニウム板の電解粗面化を行なうものであるが、これによ
って板材表面に均一且つ安定的に二重構造ピットを有す
る粗面化面を形成するような陽極時電気量ＱＡと陰極時
電気量Ｑｃとの比率ＱＣ／ＱＡは約０．３〜０．８、好
適には０．４〜０．７の範囲である。In the electrolytic surface roughening treatment of the present invention, an alternating waveform current showing such a voltage waveform is used, and as shown in FIG.
Electrolysis of the aluminum plate is carried out by applying a cell voltage such that A is larger than the cathode voltage VC, and adjusting the amount of current applied at the anode and cathode so that the amount of electricity at the anode is larger than the amount of electricity at the cathode, Qc. The surface is roughened, and the ratio QC of the amount of electricity at the anode time QA and the amount of electricity at the cathode time Qc is such that a roughened surface having double structure pits is uniformly and stably formed on the surface of the plate material. /QA ranges from about 0.3 to 0.8, preferably from 0.4 to 0.7.
また好ましい電圧範囲は陽極時電圧ＶＡを基準とすると
き１０〜５０Ｖの範囲であり、陰極時電圧Ｖｃは勿論、
陽極時電圧ＶＡよりも小さい値をとるように印加する。Further, a preferable voltage range is a range of 10 to 50 V based on the anode voltage VA, and the cathode voltage Vc is, of course,
It is applied so that it takes a smaller value than the anode voltage VA.
また、上記交番波形電流における陽極時間ｔＡと陰極時
間ｔｃとはほぼ同一でもよいが、他の電解条件が同じ場
合には上記した電気量比の範囲内で陽極時間ｔＡより陰
極時間ｔｃを長くする程電解処理に要する時間を短縮す
ることができるので、電気消費量や電解液消費量を節減
するこさができる。Further, the anode time tA and the cathode time tc in the above alternating waveform current may be almost the same, but if other electrolytic conditions are the same, the cathode time tc should be longer than the anode time tA within the above-mentioned charge ratio range. Since the time required for electrolytic treatment can be shortened, electricity consumption and electrolyte consumption can be reduced.
また、交番波形電流における周波数ｆについては通常の
交流周波数の範囲、つまり５０Ｈｚ乃至６０Ｈｚに限定
せられるものではない。Furthermore, the frequency f of the alternating waveform current is not limited to the normal alternating current frequency range, that is, 50 Hz to 60 Hz.
しかし乍ら周波数を高くする程形成される粗面化面のピ
ットが細密化する傾向がある。However, as the frequency becomes higher, the pits formed on the roughened surface tend to become finer.
上記した電解粗面化処理を施した二重構造的凹凸面を有
するアルミニウム粗面板に対し、さらに硫酸電解液中で
陽極酸化処理を施す。The aluminum roughened plate having a double structure uneven surface which has been subjected to the electrolytic roughening treatment described above is further subjected to an anodizing treatment in a sulfuric acid electrolyte.
これによって板面に硫酸陽極酸化処理特有の硬質多孔性
の陽極酸化皮膜が形成され、これと前記した二重構造的
凹凸面の形成と相俟って製版処理に際しての感光膜被着
性とオフセット印刷に際しての湿し水保水性の一段の向
上と、耐摩耗性の改善による耐刷性の向上をはかること
ができ、従って印刷性能、耐刷性共にすぐれたオフセッ
ト印刷用版材を得ることができる。As a result, a hard porous anodic oxide film unique to sulfuric acid anodization is formed on the plate surface, and this, together with the formation of the double-structure uneven surface described above, improves photoresist film adhesion and offset during plate-making processing. It is possible to further improve dampening water retention during printing and improve printing durability by improving abrasion resistance, and therefore to obtain an offset printing plate material with excellent printing performance and printing durability. can.
なお、硫酸電解液による陽極酸化処理条件は一般的な陽
極酸化処理条件が適用される。Note that general anodic oxidation treatment conditions are applied to the anodic oxidation treatment conditions using a sulfuric acid electrolyte.
次に本発明の実施例について述べる。Next, examples of the present invention will be described.
純度９９．５％のアルミニウム板（９５０ｍｍ×１ ５
０ ０ｍｍ× Ｏ．３ｍｍ）を苛性ソーダ溶液で脱脂
洗浄した後、半連続電解装置を用い、濃度７．７ｇ／ｌ
、液温３５℃の塩酸電解液を使用し、周波数１００Ｈｚ
，陽極時間ｔＡと陰極時間ｔｃとの比率ｔｃ／ｔＡが１
．７８となるように調整した台形波交番電流を用い、陽
極時電圧ＶＡが２６．４Ｖ，陰極時電圧Ｖｃが１１．Ｏ
Ｖの条件で電解槽内の滞留時間が９５秒となる送り速度
でアルミニウム板を移動させながら電解粗面化処理を行
なった。99.5% purity aluminum plate (950mm x 15
0 0mm x O. 3mm) with a caustic soda solution, and then using a semi-continuous electrolyzer, the concentration was 7.7g/l.
, using a hydrochloric acid electrolyte with a liquid temperature of 35°C, and a frequency of 100Hz.
, the ratio tc/tA of anode time tA and cathode time tc is 1
．． Using a trapezoidal alternating current adjusted to 78, the anode voltage VA is 26.4V and the cathode voltage Vc is 11. O
The electrolytic surface roughening treatment was carried out under the condition of V while moving the aluminum plate at a feed rate such that the residence time in the electrolytic cell was 95 seconds.
なお、電流密度は陽極時が３ ０． Ｏ Ａ／ ｄｍ２
、陰極時が１３．３Ａ／ｄｍ２であった。In addition, the current density is 30. OA/dm2
, the cathode power was 13.3 A/dm2.
次いで水洗後、濃度３０％、温度５５℃の硫酸溶液中に
５分間浸漬して表面に付着したスマットを除去した後水
洗し、この板を濃度１７８ｇ／ｌ１液温１９℃の硫酸電
解液を用い電流密度ＩＡ／ｄｍ２で６分４０秒間直流に
よる陽極酸化処理を施し水洗乾燥した。Next, after washing with water, the board was immersed in a sulfuric acid solution with a concentration of 30% and a temperature of 55°C for 5 minutes to remove smut attached to the surface, and then washed with water. Anodic oxidation treatment was performed by direct current at a current density of IA/dm2 for 6 minutes and 40 seconds, followed by washing with water and drying.
このようにして得られた粗面板は表面アラサ３．５μ（
Ｈｍａｘ）で全面均一な二重構造的凹凸面を有し、陽
極酸化皮膜の厚みは約２μであった。The roughened plate thus obtained had a surface roughness of 3.5μ (
Hmax), the surface had a uniform double-structure uneven surface over the entire surface, and the thickness of the anodic oxide film was approximately 2 μm.
このようにして得られた粗面板にジアゾ系感光液を用い
て製版処理を施し、これを用いてオフセット印刷を行な
ったところ従来法の塩酸系浴を用いて交流により電解粗
面化処理を行ない、以後同様に陽極酸化および製版処理
を施したものに較べて湿し水の管理が容易で刷り易く、
画線細部の表現がすぐれた印刷物が得られ、耐刷性も良
好であって５万部の印刷も行なっても伺ら変化なく良好
な印刷物が得られた。The thus obtained roughened plate was subjected to a plate-making process using a diazo-based photosensitive liquid, and offset printing was performed using this, and electrolytic surface roughening treatment was performed using an alternating current using a conventional hydrochloric acid bath. , it is easier to manage the dampening water and easier to print than those that have been subjected to the same anodizing and plate-making treatments,
Printed matter with excellent expression of line details was obtained, and the printing durability was also good, with no change in appearance even after printing 50,000 copies.
以上述べた如く本発明法によるときは従来ピット深さは
深いが、ピット構造は単純であって、従って耐刷力はす
ぐれているが印刷性能において若干劣ることのあった塩
酸系電解液を使用して、二重構造的な微細凹凸面を有す
る均一な粗面板を、極く短時間の電解処理で効率的に得
ることができ、またそのピット深さも適当な電解条件を
選ぶことによって任意に調整することができるので、印
刷性能および耐刷性の両者を満足するオフセット印刷用
のアルミニウム粗面板を容易にうることができる上、陽
極時間比、周波数の調節によって電解時間を短縮するこ
とが可能であるので、経済的な効果も大きい。As mentioned above, when using the method of the present invention, the pit depth is deep, but the pit structure is simple, and therefore, although the printing durability is excellent, the printing performance is sometimes slightly inferior. As a result, a uniformly roughened plate with a double-structured finely uneven surface can be efficiently obtained in an extremely short electrolytic treatment, and the depth of the pits can be adjusted arbitrarily by selecting appropriate electrolytic conditions. Since it can be adjusted, it is possible to easily obtain a rough aluminum plate for offset printing that satisfies both printing performance and printing durability, and it is also possible to shorten electrolysis time by adjusting the anode time ratio and frequency. Therefore, the economic effect is also large.
第１図は交番波形電流として得られる電流の電圧波形図
である。
ａ・・・・・・正弦波、ｂ・・・・・・矩形波、Ｃ・・
・・・・台形波。FIG. 1 is a voltage waveform diagram of a current obtained as an alternating waveform current. a... Sine wave, b... Square wave, C...
...Trapezoidal wave.
Claims (1)
が陰極蒔電圧より犬なるように槽電圧を印加した交番波
形電流によって電解粗面化処理を施としたのち、硫酸電
解液中で陽極酸化処理することを特徴とするオフセット
印刷用アルミニウム粗面板の製造法。1 An aluminum plate was subjected to electrolytic roughening treatment using a hydrochloric acid electrolyte and an alternating waveform current applied with a cell voltage such that the anode voltage was higher than the cathode plating voltage, and then anodized in a sulfuric acid electrolyte. A method for producing a rough aluminum plate for offset printing, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15281676A JPS585796B2 (en) | 1976-12-21 | 1976-12-21 | Manufacturing method of rough aluminum plate for offset printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15281676A JPS585796B2 (en) | 1976-12-21 | 1976-12-21 | Manufacturing method of rough aluminum plate for offset printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5377702A JPS5377702A (en) | 1978-07-10 |
| JPS585796B2 true JPS585796B2 (en) | 1983-02-01 |
Family
ID=15548775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15281676A Expired JPS585796B2 (en) | 1976-12-21 | 1976-12-21 | Manufacturing method of rough aluminum plate for offset printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS585796B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162092U (en) * | 1984-04-06 | 1985-10-28 | プラス株式会社 | Underlay |
| WO1986001544A1 (en) * | 1984-08-30 | 1986-03-13 | Matsushita Electric Industrial Co., Ltd. | Process for etching electrode foil for aluminum electrolytic capacitor |
| WO2009041659A1 (en) | 2007-09-28 | 2009-04-02 | Fujifilm Corporation | Solar cell |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137993A (en) * | 1979-04-13 | 1980-10-28 | Fuji Photo Film Co Ltd | Production of support member for lithographic printing plate |
| JPS55142695A (en) * | 1979-04-24 | 1980-11-07 | Fuji Photo Film Co Ltd | Manufacture of lithograph supporting base |
| JPS55158298A (en) * | 1979-05-30 | 1980-12-09 | Fuji Photo Film Co Ltd | Manufacture of support for lithographic plate |
-
1976
- 1976-12-21 JP JP15281676A patent/JPS585796B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162092U (en) * | 1984-04-06 | 1985-10-28 | プラス株式会社 | Underlay |
| WO1986001544A1 (en) * | 1984-08-30 | 1986-03-13 | Matsushita Electric Industrial Co., Ltd. | Process for etching electrode foil for aluminum electrolytic capacitor |
| WO2009041659A1 (en) | 2007-09-28 | 2009-04-02 | Fujifilm Corporation | Solar cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5377702A (en) | 1978-07-10 |
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